629-83-4Relevant articles and documents
A new fatty aldol ester from the aerial part of Mimosa invisa (Mimosaceae)
Nana, Frederic,Sandjo, Louis Pergaud,Keumedjio, Felix,Kuete, Victor,Ngadjui, Bonaventure Tchaleu
, p. 1831 - 1836 (2012)
A new aldol ester named 17-O-triacontanoylheptadecanal (1) was isolated from the aerial part of Mimosa invisa (Mimosaceae) together with eight known compounds identified as β-sitosterol (2), α-amyrine (3), lupeol (4), 4-O-methylepinumisoflavone (5), alpinumisoflavone (6), betulinic acid (7), 3-O β- D-glucopyranoside of sitosterol (8) and epirobinetinidol (9). The structures of compounds were determined on the basis of NMR and mass spectrometry data as well as by comparing the data reported in the literatures. The antimicrobial activities of the crude extract and compounds 1 and 9 were investigated against seven microbial species. The natural products showed moderate activities compared to that of the crude extract.
A facile synthesis of long chain acyclic alkanols via Kolbe coupling: 1-Docosanol and 1-triacontanol
Yadav, Ashok K.,Singh, Arpita
, p. 1724 - 1726 (2007/10/03)
A convenient synthesis of long chain acyclic alkanols viz., 1-docosanol and 1-triacontanol has been devised via Kolbe radical coupling of mono-methyl azelate 2, which has been synthesized from azelaic acid 1. The dimer viz. dimethyl thapsate 3, on Ba(OH)2 hydrolysis affords mono-methyl thapsate 4, which upon mixed Kolbe coupling with appropriate alkanoic acid [CH3(CH)2)nCOOH, n = 6 for 1-docosanol and n = 14 for 1-tri-acontanol] gives the cross coupled products methyl docosanoate 7 and methyl triacontanoate 8 along with the radical dimers dimethyl triacontanedioate 4′ and tetradecane 5′/triacontane 6′ as byproducts. Compounds 7 and 8 on LAH reduction in dry THF yield 1-docosanol 9 and 1- triacontanol 10, respectively in high yields. The mixed anodic coupling has been studied by varying parameters viz. degree of neutralization and molar ratio of compounds 4 and C8/C16 alkanoic acid, current density, anode material etc.
Tris (trimethylsilyl)silane in the deoxygenation of long chain unsaturated alcohols converts cis to trans isomers
Johnson,Poulos
, p. 2045 - 2048 (2007/10/02)
During radical deoxygenation reactions tris (trimethylsilyl)silane can cause cis to trans isomerization and reduction of remote double bonds in contrast to tributyltin hydride.